Many of the superimpositions throughout the film were created "in the camera". The camera would shoot one image at the side of the frame, blacking out the rest of the shot, then expose the film. They would put the exposed film back into the camera and shoot again, blocking out the area that already had an image on it. See more
[opening title cards
This song of the Man and his Wife is of no place and every place; you might hear it anywhere, at any time.
For wherever the sun rises and sets, in the city's turmoil or under the open sky on the farm, life is much the same; sometimes bitter, sometimes sweet.